Ultra high molecular weight polyethylene powder and ultra high molecular weight polyethylene powder fiber

摘要

To provide an ultrahigh molecular weight polyethylene powder capable of providing an ultrahigh molecular weight polyethylene fiber having uniform yarn diameter, capable of highly extending and continuously spinning.SOLUTION: There is provided an ultrahigh molecular weight polyethylene powder having viscosity average molecular weight is 10×10to 1000×10, and difference between a temperature to reach 80% torque value of maximum torque value and a temperature to reach 20% torque value of the maximum torque value in a measurement of torque value under following mix condition of 0.1°C to 50°C. mix condition Raw materials: A mixture containing 5 pts.mass of the ultrahigh molecular weight polyethylene powder and 95 pts.mass of a liquid paraffin based on 100 pts.mass of total of the ultrahigh molecular weight polyethylene powder and the liquid paraffin. Torque value measurement: After mixing the raw materials at 130°C for 30 min, further they are mixed at 240°C for 15 min; temperature rise rate to 130°C to 240°C is 22°C/min.; screw rotation number is 50 rpm; under nitrogen atmosphere.SELECTED DRAWING: None